JP2010139563A5

JP2010139563A5 -

Info

Publication number: JP2010139563A5
Application number: JP2008313479A
Authority: JP
Filing date: 2008-12-09
Publication date: 2012-08-09
Anticipated expiration: 2028-12-09

Description

請求項１の発明による焦点検出装置は、光学系による像面内に設定された第１検出領域に対して前記光学系の焦点調節状態を示す第１焦点検出情報を検出する第１焦点検出手段と、前記第１焦点検出手段とは異なる方法で、前記像面内に設定された第２検出領域に対して前記光学系の焦点調節状態を示す第２焦点検出情報を検出する第２焦点検出手段と、前記第１焦点検出情報と前記第２焦点検出情報とに基づいて、前記第１焦点検出情報に応じて前記光学系を焦点調節するか否かを判定する判定手段とを備えることを特徴とする。 According to a first aspect of the present invention, there is provided a focus detection device for detecting first focus detection information indicating a focus adjustment state of the optical system with respect to a first detection region set in an image plane of the optical system. When, wherein the differently between the first focus detection unit, the second focus detection for detecting a second focus detection information that indicates the focusing condition of the optical system for the second detection area set on the image plane and means, based on the said first focus detection information the second focus detection information, further comprising a determination means for determining whether to adjust the focus of the optical system in response to the first focus detection information Features.

Claims

First focus detection means for detecting first focus detection information indicating a focus adjustment state of the optical system with respect to a first detection region set in an image plane by the optical system;
In a different way than the first focus detection unit, and the second focus detection means for detecting a second focus detection information that indicates the focusing condition of the optical system for the second detection area set on the image plane ,
And determining means for determining whether to adjust the focus of the optical system in accordance with the first focus detection information based on the first focus detection information and the second focus detection information. Focus detection device.

The focus detection apparatus according to claim 1,
A plurality of the second detection areas are set in the image plane,
The second focus detection unit is configured to perform the second detection on a second detection region located in a direction in which an image by the optical system extends with the first detection region as a reference among the plurality of second detection regions. A focus detection apparatus for detecting focus detection information .

The focus detection apparatus according to claim 1 ,
The determination means has a predetermined threshold difference between a first focus distance of the optical system corresponding to the first focus detection information and a second focus distance of the optical system corresponding to the second focus detection information. When the value exceeds the value, it is determined that focus adjustment of the optical system is not performed according to the first focus detection information .

The focus detection apparatus according to claim 1 ,
The determination means has a predetermined threshold difference between a first focus distance of the optical system corresponding to the first focus detection information and a second focus distance of the optical system corresponding to the second focus detection information. A focus detection apparatus that determines to adjust the focus of the optical system according to the first focus detection information when the value is equal to or smaller than the value .

The focus detection apparatus according to claim 2 ,
Face detection means for detecting an area corresponding to the face in the image;
The first focus detection means detects the first focus detection information using the area corresponding to the face as the first detection area,
The focus detection apparatus, wherein the second focus detection means detects the second focus detection information for a second detection region located below the region corresponding to the face.

The focus detection apparatus according to claim 2 or 5,
Search range setting means for setting a search range of the second detection area in the image based on the first detection area,
The focus detection apparatus, wherein the second focus detection means detects the second focus detection information for the second detection region located within the search range.

In the focus detection apparatus according to any one of claims 1 to 6,
An imaging pixel provided at the position of the image plane that receives light through the optical system and outputs an image signal, and receives a pair of light through the optical system and outputs a pair of focus detection signals. An imaging unit having a plurality of pixels including a focus detection pixel;
The first focus detection means detects the first focus detection information based on the image signal output from the imaging pixel corresponding to the first detection region,
The focus detection apparatus, wherein the second focus detection means detects the second focus detection information based on the pair of focus detection signals.

The focus detection apparatus according to any one of claims 1 to 7,
A focus adjustment apparatus comprising: a focus adjustment unit that performs focus adjustment of the optical system based on at least one of the first focus detection information and the second focus detection information.

The focus adjustment device according to claim 8.
The focus adjustment apparatus, wherein after the focus adjustment of the optical system based on the second focus detection information is performed by the focus adjustment means, the first focus detection means detects the first focus detection information. .

A focusing device according to claim 8 or 9,
An image pickup apparatus for picking up an image by the optical system.